Experimental Study on Damage Evolution Behavior of Self-Compacting Rubberized Concrete under Direct Tensile Fatigue Load
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-1573-1
Structural Engineering
Experimental Study on Damage Evolution Behavior of Self-Compacting Rubberized Concrete under Direct Tensile Fatigue Loading Xudong Chena,b and Chen Chenb a
School of Civil Engineering, Southeast University, Nanjing 211189, China College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
b
ARTICLE HISTORY
ABSTRACT
Received 3 September 2019 Revised 13 March 2020 Accepted 17 June 2020 Published Online 4 September 2020
Fatigue properties of self-compacting rubberized concrete (SCRC) under axial tension are rare. To explore the fatigue damage evolution of SCRC, the direct tensile fatigue test and residual mechanical test were conducted. According to the experimental results, the linear relationship between the fatigue life and secondary strain rate also exists in tensile fatigue test of SCRC, and the slope value is similar to the compressive and direct tensile fatigue test of ordinary concrete. Further, the downtrend of the residual secant modulus is more obvious than the residual strength. In addition, the direct tensile fatigue damage evolution of SCRC under different stress levels can be predicted by the Isojeh’s model.
KEYWORDS Self-compacting rubberized concrete Fatigue loading Direct tension Secondary strain rate Damage evolution model
1. Introduction In recent years, waste tire rubber particle has been widely used in the concrete and asphalt concrete to save natural resources (Ma et al., 2016, 2017; Chen et al., 2019a) and it can decrease the dead weight, and improve the toughness and crack resistance of concrete (Moustafa and Elgawady, 2015; Wu et al., 2018; Ding et al. 2019). Furthermore, self-compacting rubberized concrete (SCRC) can be foamed by adding the rubber particles into the self-compacting concrete (SCC). It can not only improve the toughness, but also does not need to vibrate, saving human resources (Bignozzi and Sandrolini, 2006; Najim and Hall, 2010; Alyhya et al., 2016). In previous researches, the fresh and harden mechanical properties have been studied (Bignozzi and Sandrolini, 2006; Aslani et al., 2018). Najim and Hall (2010) concluded the properties of SCRC, and found that the SCRC has remarkable vibration absorption characteristics. It can be used in the highway and rail crash barriers, and sea wall defences. In the ocean engineering and pavement engineering, it will subject repeated or cyclic loads, which may cause fatigue degradation. However, CORRESPONDENCE Xudong Chen [email protected] portation Engineering, Hohai University, Nanjing 210098, China ⓒ 2020 Korean Society of Civil Engineers
few researches focused on the fatigue properties of SCRC, especially for the tensile fatigue properties (Ganesan et al., 2013; Chen et al., 2019b). Many researchers have concerned the tensile mechanical properties of concrete, and studied it by splitting tensile and flexural test (Behnood and Ghandehari, 2009). However, the splitting tensile and flexur
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